The DC Universe Sourcebook

Traveling back in time to stop Professor Zoom from killing his mother, The Flash inadvertently created the Flashpoint timeline. Now knowing the point of divergence, the Flash resumes his attempts to restore the timeline. Barry then meets his mother, and reveals his secrets and his inadvertent role in creating the Flashpoint universe by saving her life. Barry bids a tearful farewell to her and Nora Allen also accepts her fate, acknowledging that she will be reunited with her husband in the afterlife when Barry succeeds. Traveling back in time, Barry merges with his younger counterpart during the attempt to stop Thawne, inadvertently creating another timeline which slightly differs from either the Flashpoint or original universe.